When to take it
In the morning or during the day with food.
← All supplements
OtherWeak evidence
Spirulina
Also known as: Arthrospira platensis, blue-green algae
Spirulina is a blue-green cyanobacterium (Arthrospira) rich in protein, iron, beta-carotene and the pigment phycocyanin. It is taken as a "superfood" supplement, but health benefits are supported only by small studies.
What it is used for
- Modest improvement in blood lipids – weak evidence
- Antioxidant effects – weak evidence
- Source of protein and iron – only a small contribution at usual doses
- Vitamin B12 – not a reliable source, it contains mostly inactive analogues
Forms and how they differ
powder
for smoothies, strong taste
tablets / capsules
convenient, gram doses need several pieces
organic spirulina
less pesticide risk, but also check testing for heavy metals and microcystins
Pairs well with
Vitamin C (better iron absorption), a varied plant-based diet.
Do not combine / separate
Be careful with immunosuppressants and blood thinners; it does not replace B12 on a plant-based diet.
Watch out for
Not suitable with phenylketonuria (contains phenylalanine). With autoimmune disease, in pregnancy, while breastfeeding, with kidney or liver disease, gout and when taking medicines, consult your doctor.
Safety
Do not exceed the label dose. Choose products tested for heavy metals and cyanobacterial toxins.
Practical tip
On a plant-based diet take B12 separately – do not rely on spirulina for it.
Products containing Spirulina 9
Spirulina + chlorella+ chlorella
Spirulina organic powderorganic powder
Spirulina organicorganic
Spirulina + Astaxanthintablet
Spirulina 1000 mgtablet · 1 000 mg / tablet
Spirulina 500 mg500 mg / tablet
Spirulina 500 mgtablet · 500 mg / tablet
Spirulina
Spirulinapowder
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence
Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.
Combination check
Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.
Check Spirulina with othersWhich supplements do you actually need?
Fénix Methode picks them from your blood results and schedules when to take what – no needless purchases.
From the same group
AlfalfaNo evidenceAndrographisWeak evidenceAroniaWeak evidenceBarley grassWeak evidenceBee pollenWeak evidenceBeef organs (desiccated)Weak evidence
Important notice
This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.